/*
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 */

package homework.demo04;

/**
 *
 * @author Administrator
 */
public class CheckEmail {
    public static void main(String[] args) {
        String email="452901371@qq.com";
        boolean flag=true;
        if(!(email.startsWith("@"))){
            flag=true;
        }
    String numstr="0123456789";
    }

}
